MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty vs exists vs double bang

Object lookup performance

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/119.0
Firefox 119
Mac OS X 10.15
Desktop
one year ago
Test name Executions per second
undefined 798379776.0 Ops/sec
typeof 813430528.0 Ops/sec
in 799115264.0 Ops/sec
hasOwnProperty 808549824.0 Ops/sec
double bang 809473792.0 Ops/sec
exists 809339840.0 Ops/sec
Script Preparation code:
Tests:

  • undefined

  • typeof

  • in

  • hasOwnProperty

  • double bang

  • exists

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